How does the 15° rule work?
What will be an ideal response?
The 15° rule states that for every 15° the temperature rises over the standard of 70°F, the time to cure is doubled; and for every 15° the temperature drops below the standard, the cure time is cut in half. That means that if the product procedure sheet states that a finish will cure to the touch in 4 hours at 70°F and the actual temperature is 55°F, it will actually take 8 hours to cure. Accordingly, if the actual temperature is only 40°F, the finish will take 16 hours to cure. On the other hand, if this same product is sprayed in an 85°F shop, it will take only 2 hours to cure, and only 1 hour if the temperature is 100°F. The 15° rule applies to finishes as they are being forced dry as well, and it is easy to see why forcing a finish to 140°F will cure it in 40 minutes.
You might also like to view...
Sarah and Thomas are going bowling. The probability that Sarah scores more than 175 is 0.4, and the probability that Thomas scores more than 175 is 0.2. Their scores are independent.
a. Find the probability that both score more than 175. b. Given that Thomas scores more than 175, the probability that Sarah scores higher than Thomas is 0.3. Find the probability that Thomas scores more than 175 and Sarah scores higher than Thomas.
Wet sand and gravel soils tend to _____.
a. slide b. crack c. hold water d. hold firm
Explain why blades are tapered and twisted
What will be an ideal response?
The PCM may turn the A/C clutch on or off in all of the following situations EXCEPT:
A. during WOT operation B. if power steering pressure exceeds a specified value during idle C. when the electric cooling fan is turned on D. when the A/C control switch is turned on